Railway truck



Dec. 26, 1939.

A. H. PAGENKEMPER RAILWAY TRUCK 2 Sh ets-Sheet 1 Filed Aug. 8, 1938 1939. A. H. PAGENKEMPER 4 RAILWAY TRUCK Filed Aug. 8, 1938 2 Sheets-Sheet 2 m- 3 Q L1.

. v O v IIII/ FIG. 2.

INVENTOR BY AT ORNEY Patented Dec. 26, 1939 UNITED stares PATENT QFFlCE Application AugustS, 1938, Serial N0. 223,617

3 Claims.

The invention relates to railway rolling stock and consists in novel truckstructure and more particularly in bolsters arranged for mounting on laterally swinging hangers suspended from the 5 truck frame.

Bolsters in such trucks usually comprise .a central portion, which forms or mounts the truck center plate upon which the vehicle body is carried, and arms extending from the central portion longitudinally of the truck to engage the swing hangers by which the bolster is suspended. Due to the heavy load carried by the bolster, it has been customary to provide the end of each of the bolster arms with a hanger-receiving pocket structure extending around the sides and bottom of th hanger link. Because of the heavy sections of the truck frame transoms and bolster arms required for increasingly heavy equipment and also because of restrictions in clearances required for the brake gear and other truck equipment, it is difficult or impossible to provide the strong pocket structure just referred to, and one object of the present invention is to meet the difficulty thus encountered.

This object is attained by lightening the individual pocket structure and providing transverse braces extending between the pockets at opposite sides of the truck. The closed-bottom pockets referred to above are susceptible to being filled with dirt, interfering with the free pivotal move-.

ment between the hangers and the bolster and necessitating the pockets being cleaned out, which is difficult due to the inaccessibility of the pockets in the assembled truck, and it is another object of the present invention to make the hanger pockets self-clearing.

These and other detailed objects of the invention are attained by the structures illustrated in the accompanying drawings, in which- I Figure 1 is a top view of a six-wheel railway truck, the wheels and axles being shown in dot and dash lines and a portion of the truck frame being broken away, all for clarifying the illustration.

Figure 2 is in part a side elevation and in part a longitudinal vertical section of the structure shown in Figure 1 and is taken on the line 2-2 of Figure 1. This figure includes portions of the brake gear which are omittedin Figure 1 as they would confuse the illustration.

Figure 3 is a vertical transverse section taken on the line 33 of Figure 1.

The truck includes wheels I, axles 2, journal boxes 3, springs 4 and 5, equalizers 6, all of well known structure and serving to carry the truck frame. The latter includes wheel pieces 1 and transoms 8, the transoms 8 comprising spaced vertical walls 9 and it provided with seats H for hanger-supporting pins l2. The hangers l3 are suspended by pins ii to swing transversely of the 5 truck and support the bolster through pins M. The bolster has a general H-shaped conformation, the central body portion or cross-bar being located above the middle axle and including the "truck center plate H5, or provision for mounting 10 the same, and brackets-l6 forming truck side bearings, or mounting surfaces therefor.

The legs ll of the H-section form bolster arms extending from the central portion downwardly and longitudinally of the truck and terminating 15 in pockets I8 for receiving the lower ends of hangers I3 and the hanger pins l4. Each bracket l8 opens upwardly,'outwardly, and downwardly to facilitate reception of the hanger, to avoid entrapment of dirt and to permit the bot- 20 tom element of the hanger to project downwardly to the lowermost level permitted by clearance conditions which, in this case, are determined by the brake beams l9 extending transversely of the truck immediately beneath they 25 hangers. This clearance limitation applies to the bolster arm also, hence the bottom element of the hanger is at the same level substantially I as the bottom element of the bolster arm.

Obviously the elimination of the bottom wall 30 on the bolster pocket detracts from the rigidity and strength of this portion of the bolster structure and to avoid any undesirable weakness because of this lightening of the pocket structure there is provided a transverse braceZO extending 35 from the pocket structure at the end of one bolster arm to the pocket structure atthe end of the corresponding bolster arm on the opposite. side of the truck.

Preferably the bolster is a one-piece casting 0 and bolster armsll are of box shaped cross section and braces 20 are of channel section, but the casting of the bolster integrally and the sectional shapes and other details of the structure may be varied substantially to meet different 45 requirements of strength, clearances, and manufacturing conditions, and the exclusive use of those modifications of all features of the invention which come within the scope of the claims is contemplated. 50

What is claimed is:

1. In a railway truck, wheels, axles, a truck frame carried thereby, hangers pivotally suspended from opposite sides of said frame, a bolster having a center plate portion and a pair of 55 transversely spaced arms extending longitudinally of the truck at each side of said portion, transverse tie members spaced from said center plate portion and connecting. the outer end portions of each pair of arms, brackets on said tie members, the outer end portions of said brackets being in longitudinal alinement with the end portions of said arms and spaced therefrom to form with the latter an open bottom pocket adapted toreceive and pivotally connect the lower end portions of said hangers to said bolster, said brackets, the adjacent portions of said cross tie, and the end portions of said arms being of boxshaped cross-section to form strong U-shaped pockets for said swing hangers, the open part of the-U facing transversely and outwardly.

2. In a'railway truck, Wheels, axles, a truck frame carried thereby, hangers pivotally suspended from opposite sides of said frame, a bolster having a center plate portion and a pair of transversely spaced arms extending longitudinally of the truck at each side of said portion, transverse tie members spaced from said center plate portion and connecting the outer end portions of each pair or arms, brackets extending longitudinally from said tie members towards the end of the truck and then transversely towards the side of the truck, each of said arms having a vertical transverse end face and each of said transverse portions of said brackets having a transverse vertical face, and a pin extending through each of said arm faces, the corresponding bracket faces and the lower portions of the corresponding hanger to form pivotal connections between the bolster and swing hangers.

3. A structure as described in claim 2 in which the corresponding end portions of the arms and the corresponding brackets on the tie members form pockets opening outwardly.

ARTHUR H. PAGENKEMPER. 

